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AssigneeMosaid Technologies Incorporated
InventorsAbdullah Ahmed, Valerie L. Lines
Estimating the term…
The invention detects multiple matches between search and stored data in high-density content addressable memories. An input signal is derived from the matchlines, such that the input signal starts discharging form a predetermined precharge level towards a discharge level determined by the number of match conditions. A reference signal is generated such that it starts to discharge at the same time from the same precharge level towards a reference level which falls between the two discharge levels corresponding to single and double match condition. A latching differential amplifier is activated shortly thereafter to compare the input signal with the reference signal and thereby provide an indication whether a multiple single or no match occurs on the matchlines, after which the amplifier is deactivated. The disclosed circuit features a relatively fast detection with low current consumption.
A signal detection circuit comprising:
A signal detection circuit for detecting a multiplicity of n match conditions occurring among a plurality of m matchlines within a CAM array where 2≦n<m, comprising:
A method of detecting a multiplicity of n match conditions occurring among a plurality of m matchlines within a CAM array, where 2≦n<m, comprising the steps of
Dependencies are inferred from the claim text.